9y^2+16y-20=0

Simple and best practice solution for 9y^2+16y-20=0 equation. Check how easy it is, and learn it for the future. Our solution is simple, and easy to understand, so don`t hesitate to use it as a solution of your homework.

If it's not what You are looking for type in the equation solver your own equation and let us solve it.

Solution for 9y^2+16y-20=0 equation:


Simplifying
9y2 + 16y + -20 = 0

Reorder the terms:
-20 + 16y + 9y2 = 0

Solving
-20 + 16y + 9y2 = 0

Solving for variable 'y'.

Begin completing the square.  Divide all terms by
9 the coefficient of the squared term: 

Divide each side by '9'.
-2.222222222 + 1.777777778y + y2 = 0

Move the constant term to the right:

Add '2.222222222' to each side of the equation.
-2.222222222 + 1.777777778y + 2.222222222 + y2 = 0 + 2.222222222

Reorder the terms:
-2.222222222 + 2.222222222 + 1.777777778y + y2 = 0 + 2.222222222

Combine like terms: -2.222222222 + 2.222222222 = 0.000000000
0.000000000 + 1.777777778y + y2 = 0 + 2.222222222
1.777777778y + y2 = 0 + 2.222222222

Combine like terms: 0 + 2.222222222 = 2.222222222
1.777777778y + y2 = 2.222222222

The y term is 1.777777778y.  Take half its coefficient (0.888888889).
Square it (0.7901234570) and add it to both sides.

Add '0.7901234570' to each side of the equation.
1.777777778y + 0.7901234570 + y2 = 2.222222222 + 0.7901234570

Reorder the terms:
0.7901234570 + 1.777777778y + y2 = 2.222222222 + 0.7901234570

Combine like terms: 2.222222222 + 0.7901234570 = 3.012345679
0.7901234570 + 1.777777778y + y2 = 3.012345679

Factor a perfect square on the left side:
(y + 0.888888889)(y + 0.888888889) = 3.012345679

Calculate the square root of the right side: 1.735611039

Break this problem into two subproblems by setting 
(y + 0.888888889) equal to 1.735611039 and -1.735611039.

Subproblem 1

y + 0.888888889 = 1.735611039 Simplifying y + 0.888888889 = 1.735611039 Reorder the terms: 0.888888889 + y = 1.735611039 Solving 0.888888889 + y = 1.735611039 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '-0.888888889' to each side of the equation. 0.888888889 + -0.888888889 + y = 1.735611039 + -0.888888889 Combine like terms: 0.888888889 + -0.888888889 = 0.000000000 0.000000000 + y = 1.735611039 + -0.888888889 y = 1.735611039 + -0.888888889 Combine like terms: 1.735611039 + -0.888888889 = 0.84672215 y = 0.84672215 Simplifying y = 0.84672215

Subproblem 2

y + 0.888888889 = -1.735611039 Simplifying y + 0.888888889 = -1.735611039 Reorder the terms: 0.888888889 + y = -1.735611039 Solving 0.888888889 + y = -1.735611039 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '-0.888888889' to each side of the equation. 0.888888889 + -0.888888889 + y = -1.735611039 + -0.888888889 Combine like terms: 0.888888889 + -0.888888889 = 0.000000000 0.000000000 + y = -1.735611039 + -0.888888889 y = -1.735611039 + -0.888888889 Combine like terms: -1.735611039 + -0.888888889 = -2.624499928 y = -2.624499928 Simplifying y = -2.624499928

Solution

The solution to the problem is based on the solutions from the subproblems. y = {0.84672215, -2.624499928}

See similar equations:

| 4(13-g)=3(6+2g) | | x^2-3x-36=362 | | 2a/3-a/2 | | 75p^3-25p^2-3p+1=0 | | 7z+3=9z-13 | | 6xln(x)=9.1 | | 7x-3(x-4)=-9+4 | | 2x+16x=9 | | In(x)=In(x-7)+In(6) | | 4y-5atY=6 | | ln(x)=ln(x-7)+ln(6) | | 3x-4=2x/3 | | 3x-15/6-x | | 4(6x+2)=3 | | 0.4(x-2)=8.0 | | 2x+3(3x+5)=26 | | 12x-51=3x+12 | | Y^2+2y=-1 | | 5(x+7)+x=4(x+3)+2 | | (6x-18)/6 | | 7x+15+3x=-9(x+10) | | 7x-5=9x+8 | | 1=3-2(X+7) | | 2(6x+6)+2(5x+6)+5=22x+30 | | 7(x-7)+21=5(x-4) | | -9+7x=-28+-4x | | 12n+7=101 | | x=-28+-4x+4x | | x+5x=96 | | 4+x+7+x=3 | | x=4+-4 | | 336=21w^2 |

Equations solver categories